On the Precipitating Process of Manganese from Solid Solution of Aluminium-Manganese Alloys (I)

Orientation relationship between Al6Mn precipitates and the Al matrix during continuous recrystallization in Al–1.3%Mn

“…The two identical orientation relationships derived by Kusumoto & Ohta (1954), Kong & Nam (1996) and Kong et al (1996) very well accord with the results of case (i) of the present study ( Fig. 8a), which evidently substantiates the occurrence of this orientation relationship.…”

“…8). In that context it has to be noted that Kusumoto & Ohta (1954), Nagahama et al (1971), Kong & Nam (1996) and Kong et al (1996) used a different de®nition of the orthorhombic Al 6 Mn phase with the a and b axes being exchanged. Thus, for a comparison with the present results, the corresponding orientation relations of the literature had to be transformed into the present coordinate system.…”

“…Whereas the formation of the various stable and metastable phases in Al±Mn alloys is understood quite comprehensively, information on the crystallographic orientation relationships of the various phases, especially Al 6 Mn, to the Al matrix is only sparse and, moreover, contradictory. Kusumoto & Ohta (1954) studied precipitation in Al±Mn alloys with 0.63± 1.25 wt% Mn by means of X-ray diffraction techniques and derived an orientation relationship of the Al 6 Mn phase (marked with subscript p hereinafter) with the Al matrix (subscript m) of (315) m ||(001) p , [13 Å 0] m ||[100] p . Nagahama et al (1971) reported an orientation relationship {111} m ||{110} p , h110i m ||h001i p in Al± 1.34 wt% Mn.…”